Closing band for piston rings



June 13, 1933. BLEY CLOSING BAND FOR PISTON RINGS Filed Nov. 14, 1931 Fig 7 Fly 2 Patented June 13, 1933 1 KURT BLEYQOF MAGDEBURG, GERMANY CLOSINGBAND'FOR PISTON RINGS Application filed November 14, 1931, Serial No. 575,056, and in Germany August 31, 1931.

Hitherto closing bands provided with a clamping device, a screw thread, tongs or locking pin, were employed for inserting pistons withrings, especially pistons for motor 5 car engines. This closing device is however often very inconvenient, when inserting pis- 1 tons into the cylinders, asthe cylinders are so close together in the engines that the bulky closing devices get into the way of one an other or are impeded by projecting parts of the cylinder block. V 1

Consequently according to the invention the closing band is so constructed that the closing can be effected without special closing device in that teeth are stamped out of the band in such manner that, when placing the closing band around the piston rings, the closure is caused by the interengagement of the teeth. Thus the closing device is saved,

and the band can be opened in a very simple manner, after inserting the pistons, by slightly compressing same.

The closing band consists of a sheet metal strip, about mms. in width, from the mid- 25 dle of which teeth, about 10 mms. in length, are stamped out at an angle of about in "the same direction. As the band is stamped throughout its entire length, it is possible to cut off a section of the desired length. The 0 sheet metal strip is placed around the piston rings so that the two ends meet and the stamped out teeth of one end are hooked into the apertures at the other end. The closing band is however thereby bent so that it does not bear at all points, but only at four or five points, so that the piston rings are tightly closed. 1 1

The closing band has bent out portions on its outer side, which bear against the cylinder wall during the insertion of the piston so that the band cannot be pressed into the interior of the cylinder.

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which:

Fig. 1 shows the band in side elevation.

Fig. 2 shows the band seen from the edge.

Fig. 3 shows in top plan view a band mounted on a piston.

Fig. 4: is a side elevation of Fig. 3.

Fig. 5 is a cross-section of the sheet metal strip forming the band, showing one of the teeth stamped out at an angle of 30.

The closing band 1 consists of a sheet metal strip. 2 with teeth 3, stamped out from the band at an angle of about 30 in the same direction, the outer edgesof the band being provided with outwardly bent portions 4. 1

Figs. 3 and 4 show a piston 5 with the band 1 and the outwardly bent portion 4. Fig. 4 shows further the piston before insertion into the cylinder.

I claim: j

A closing band for piston rings, comprising a section cut to length according to the size of the piston ring from a continuous strip having uniform teeth stamped along its entire length and projecting from one side of the strip, said teeth adapted to interlock and close said band.

In testimony whereof I aifix my signature.

KURT BLEY. 

